Abstract: In order to leam the infective and epidemic status of rickensiosis in Shandong province,epidemiological and serological investigations on typhus , Q fever,spotted fever and tsutsugamushi fever were carried out.The results showed that the province was one of the important epidemic typhus district in the country.The cases occurred mainly in the 4th season.The cases aged 15 to 50 accounted for 62.2%.The sex ratio was 1.80∶1(man/female ).Peasant and pupil cases were more common.The infective rates of Q fever were:human 1.18%,goat 13.14% ,cow 3.47% ,dog 32.56% 6,pig 1.75% .The infective rates of spoUed fever were : human 13.07% ,goat 13.58%,cow 43.70% ,donlcey 54.55%.Tsutsuganlushi fever becomes more and more dangerous in the province.The number of epidemic counties increased to about 20 since later 1980.Also 117 tsutsugamushi fever cases occumed in recent 2 years were investigated and analysed.